Priority mail, flat rate mailer, even a flat rate envelope for a single unit. Yes, lots of bubble wrap. Sign up on your computer to use usps click and ship to get free delivery confirmation. Go to the PO and it's 50 cents.
But if it's a single unit (less than 13 oz), you may consider the slow boat-first class mail. It goes about as fast as priority. But you don't get the deals you do w/ priority mail.
The PO has a special publication that is quite extensive as to how business should ship. It is excellent and it is free. Lots of great ideas. But most of the better ideas translate into shipping on your computer through usps click and ship.
Happy holidays. John Eaton, Jonesboro, AR